CPM Homework Help : CC2 Problem 4-19

Copy and complete each of the Diamond Problems below. The pattern used in the Diamond Problems is shown at right.

Generic Diamond Problem. One number, X, is located on the left side. The second number, Y, is located on the right side. The bottom number is the sum of the two numbers, X and Y. The top number is the product of the two numbers, X and Y.

Hint (a):
What number plus $1.2$ equals $-1.8$ ?
More Help (a):
Multiply your answer by $1.2$ to find the top portion of the diamond.
Answer (a):
Right: $(-1.8)-1.2=-3$
Top: $1.2(-3)=-3.6$

Hint (b):
What two numbers add to $4$ and, when multiplied together, equal $-12$ ?

Hint (c):
See part (a).

Hint (d):
See part (b).
Answer (d):
$7$ and $-8$